Examine source code of forest mirror

{
  "theme": {
    "images": {
      "theme_frame": "forestkaleidoscope.jpg"
    },
    "colors": {
      "frame": "#0b5751",
      "tab_background_text": "#b2e2ed"
    }
  },
  "version": "2.0",
  "name": "forest mirror",
  "manifest_version": 2,
  "description": "A repeating kaleidoscopic pattern based on leaves and branches"
}